Improvement in hand sawing-machines



G. R. CANNINSL T. CRAWFURD.

Hand SawingfMachines'.

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Paten. ed Ma rch17.187 4.

Mzesses.

NITED STATns PATENT FFIO.

GEORGE R. CANNON AND THOMAS CRAWFORD, OF SEVILLE, OHIO.

IMPROVEMENT IN HAND SAWlNG-MACHINES.

Specification forming part of Letters Patent No. 145,595, dated March17, 1874; application filed February 2, 1874.

To all whom t may concern:

Be it known that we, G. R. CANNON and TH. CRAWFORD, of Seville, in thecounty of Medina and State of Ohio, have invented certain new and usefulImprovements in Hand Sawing-Machines, of which the following is adescription, reference being had to the accompanying drawing making apart of this specification, in which- Figure lis a plan view of themachine. Fig. 2 is a side view. Fig. 3 is a front elevation.

Like letters of reference refer to like parts in the several views.

The object of this invention is for cross-cutting logs, the machinebeing operated through certain mechanism by hand, the construction andoperation of which are as follows:

A is a frame, in which is mounted the gearing for driving the saw. Saidgearing consists of the cog-wheel B and pinion C, beveled wheel D, andpinion E, and ily-wheel F, all of which are secured to the shafts G H I,respectively, and in such relation to each other as shown in Fig. l. Jis the saw, secured in the end of the arm K. Said arm is attached to across-head, L, fitted to and moving in the ways or guides M. Also, tothe cross-head is attached one end of a link, N, and the Oppo site endis attached to one arm ofthe lever O, pivoted to the end of the frame.The lever referred to is vibrated by the crank I), to which it isconnected by the rod g. The cross-head and ways referred to are securedto an adjustable stirrup, R, fitted loosely to the end of the frame A,4so that it is permitted to slide vertically for raising and loweringthe cross-head and ways by means of the lever S, attached thereto by thecord T, for a purpose presently to be shown. U is a yoke, through whichthe end of the beam or saw-arm K passes, whereby said arm and saw areraised Or lowered, by raising or lowering the cross-head and waysthrough the lever V, attached thereto by the cord XV.

The practical operation of the machine is as follows: rlhe log to beopera-ted upon is laid lengthwise of the frame, as indicated by thedotted lines a, Fig. l. For this purpose the saw and cross-head areelevated by the levers S V, so as to bring the saw to the top of thelog. The saw is now operated by turning the cog-wheel B, which, by itsconnection therewith, in the manner as above described, will cause it towork and saw into the log. The

weight of the saw and arm is sufficient to feed it down into the log,and, when the log is cut through, the saw and cross-head are againraised by the levers S V, thereby allowing the log to be moved forwardunder the saw for another cut.

The machine is intended to be operated by hand, and, in consequence ofthe arrangement and combination of the gearing, it can be run with butlittle power applied to the crank A.

Vhat we claim as our invention, and desire to secure by Letters Patent,is,-

The stirrup It, yoke U, levers' S V, crosshead L, and ways M, incombination with the pitman N, vibrating lever O, connecting-rod Q, andcrank-wheel P, substantially as and for the purpose set forth.

GEO. R. CANNON. THOMAS CRAWFORD.

Witnesses M. C. DAvIs, L. A. EASTON.

